JPS61263889A - Multi-hull ship - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a multihull boat having at least two floats that are long in the direction of travel of the boat.

<Prior art> A conventional catamaran has two floats, front and rear elastic skirts disposed between the floats, a main propulsion engine, and a fan that blows air into an air cushion chamber. There is.

The floats fl extend in the direction of travel of the catamaran and are arranged parallel to each other. The cross section of the float gradually becomes wider from the bottom upward. The two floats are rigidly connected by a deck at their upper ends. The skirt is disposed between the two floats and extends at least approximately to the surface of the water. The skirt together with the float forms an air cushion chamber between the water surface and the bottom of the deck. The main propulsion engine drives propulsion means located at the tail of the float. The fan blows friendly air drawn in from the outside into the air cushion to float the catamaran so as to shift from displacement mode to air displacement craft mode.

<Problems to be Solved by the Invention> In catamarans such as those described above, objects such as probes or buoys used in oceanography often have to be dropped into the water from inside the ship. In some cases, it may also be necessary to pick up items from the water and onto the ship.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a multihull vessel capable of dropping objects into the water invisibly and, if necessary, also picking them up from the water.

At least one closable opening is provided in the deck extending transversely of the ship.

Opening 1t-z provided in the lowest deck between floats
, it is open to the air cushion chamber between the floats formed above the water surface, so it cannot be seen from the outside.
The 17'j can also transport items vertically from the hull into the water and in the opposite direction, unhindered by rough sea movements or bad weather. In a preferred embodiment of the invention, the opening is closed in a water-tight and gas-tight manner by a plate structure. When the plate structure is closed, the operation of the air absorption craft mode is not disturbed in any way.

1. In a preferred embodiment of the present invention, the bottom part is opened in order to open the plate structure and allow the entire article to fall into the water not only during operation in the displacement mode but also during operation in the air absorption craft mode. An airtight chamber is formed above the opening. The lower end of the airtight chamber is hermetically connected to the inner peripheral edge of the deck surrounding the opening over the entire circumference of the opening. In other words, the chamber containing the articles that have to be dropped or picked up is formed in the air cushion II formed below the multihull.

In order to have adequate space available, the opening must be rectangular. The cross-sectional area of this opening is preferably approximately 3 to 7 m x 2 to 3 m.

The present invention is suitable for use in the airships described in the patent application filed by the same applicant on the same day with the West German Patent Office under the name "Catamaran". In this West German patent application, two floats are rigidly connected at their upper ends by a truss girder, on which a standard container with a ship's interior and a passageway is supported. In such a catamaran-type air cushion ship, it is desirable that the dimensions of the opening match the horizontal cross-sectional dimensions of the container, which has an airtight chamber located directly above the opening and having an open bottom. The entire coupling structure is thus located above the float.

In addition to replacing containers containing objects that can be dropped without any hindrance, another embodiment of the invention provides that the lower end of the container forms part of the bonding structure by removable sealing means. It is connected to the support part.

In one embodiment of the invention, the sealing means comprises an inflatable sealing hose. The sealing hose surrounds the entire lower end of the container, is provided at the periphery of the support surrounding the opening, and is disposed in the groove. In an expanded state, the sealing hose is provided on the outer periphery of the lower end of the container and contacts the entire periphery of the hermetic sealing flange.

By releasing the container from the sealing means and the support block, the container can be easily removed from the hull. Also, in this way, the container can be exchanged with other similarly configured containers with droppable items suspended inside.

However, do the front and rear parts of the container have a buffering effect? Preferably, it is held to the bonding structure via a support block having a support block. Therefore, the fixing means is provided at a location remote from the sealing means. Preferably, the fastening means are constructed in the same manner as described in the above-mentioned patent application filed on the same day with the West German Patent Office by the same applicant.

In one particularly effective embodiment of the present invention, the plate structure is composed of two flaps.

Preferably, these flaps are configured to pivot downwardly and open about a pivot extending along the longitudinal axis of the ship. With this configuration, the air and (if necessary) underwater resistance of the outwardly pivoted flaps is negligible. Therefore, even if the flap rotates outward, the ride comfort of the boat is not affected.

In another embodiment of the invention, since the pressure inside the chamber is high and the opening at the bottom does not normally allow access to the airtight chamber,
A sling is provided within the airtight chamber for suspending items that can be dropped through the opening. Preferably, this hanging device is installed outside the airtight room and can be released by a control device.

After the flaps have been opened, the objects which are intended to be dropped and which have been placed in the container before it is loaded onto the ship are released without any hindrance from the slings which are controlled from outside the airtight room.

The opening is most preferably provided in the third closest to the stern. In this part, the water surface between the floats is generally calm. It is also preferable that the opening be provided in the catamaran located in the center of the ship.

It is desirable that the float has an appropriate height above the displacement water line so that the flap when rotated downward is located, for example, 2 meters above the water surface. Thus, the downwardly pivoted flap should touch the water surface only in special cases when the ship is running in displacement mode (i.e. when the sea is rough).

<Embodiment> As can be seen from FIG. 1, the catamaran air cushion craft according to the present invention has two floats 311 extending parallel to each other along the longitudinal axis of the ship. Air cushion craft have air cushion airtight skirts that are not provided at the bow and stern. float 311
has an air cushion craft waterline 327 during air cushion craft operation. Air cushion craft water line 327 is located near the lower end of float 311 and is submerged in water during displacement operations. At this time, the water surface reaches the water level 328 in the displacement mode. The float 311 is
In the water displacement mode, the water line 3280 has a stepped portion 329 facing inward. In comparison, the upper half of float 311 is approximately twice as wide as the lower half of float 311.

Be friends, air cushion! 31C1, float 31
1, a skirt (not shown) extending to the float 311, and a 7” q dr 3 extending along the transverse axis of the ship.
12, and is separated by Isui@327 and 328.

The two floats 311 are fixedly connected at regular intervals by a truss girder 330 extending in the transverse direction of the ship. A standard container 318' is secured between the truss girders. The lower surface of the truss girder 330 has a float 31
It is in contact with the top surface of 1.

Specifically, the truss girder 330 is fixed to the bulkhead of the float 311. Finally, a passage 331 is provided within the truss girder 330 to ensure horizontal traffic. 1st
The figure shows this state t-schematically.

The interior of the standard container 318' is provided with a conventional interior structure including a crew compartment. The auxiliary engine or other component 336 is mounted along a standard container 318' located above the float 311.
It is provided on the side of 18'.

The main propulsion engine is installed in the wide upper half of the float 311. The bridge deckhouse 334 is provided on a joint structure constituted by the truss girder 330.

As shown in FIGS. 1 and 2, a rectangular opening 313 is provided in the deck 312 in the third of the bonded structure between the two truss girders 3300 and closest to the stern. There is. At its bottom, the deck 312 seals the joint structure constituted by the truss girder 660 in a watertight and airtight manner. A pivot shaft 324 to which the flap 314 is pivoted extends in the longitudinal direction of the ship and is provided on both sides of the rectangular opening 313. The flap 314 is
It is fixed to the deck 312 and selectively pivoted by a 9' hydraulic cylinder 335. That is, the flap 314 is
It pivots between a closed position, shown in solid lines in FIG. 2, and an open position, shown in dashed lines in FIG. 7-love 314 projects downward from deck 612 in the open position.

A support portion 321 is disposed on the truss girder 330 surrounding the rectangular opening 313t. The deck 312 is arranged below the support section 321.

A peripheral groove 322 is provided at the inner edge of the support portion 321 . The expandable sealing hose 320 is connected to the peripheral edge #113.
It is arranged over the entire length of 22.

The sealing hose 320 is connected to a pressure source via a pneumatic path, a hydraulic path 336, and a valve (not shown).

The lower end 316 of the standard container 318 is connected to the sealing hose 3
A rectangular opening 313 in the nine chambers formed by 20
is placed above. Standard container 318 differs from other standard containers 318' in that its bottom 319 is open.
distinguished from A sealing surface 323 is formed over the entire circumferential surface of the lower end portion 316. The sealing surface 323 is connected to the sealing hose 32 when the standard container 318 is installed.
0 in the horizontal direction.

As shown in FIGS. 1 and 2, when the standard container 318 is installed, the standard container 31
The chamber 315 within 8 is sealed under pressure to the rest of the bonded structure.

A pivot 324 of the flap 314 is fixed to an inner peripheral edge 317 of the deck 312 surrounding the rectangular opening 316.

An article, for example, a measuring buoy 337 ifc is a measuring probe 338
A hanging device 325 is provided inside the standard container 318 from which the container is hung. The hanging fixture 325 is preferably provided on the ceiling of the standard container 318. Hanging tool 3
25 may be remotely operated from outside the standard container 318.

In this way, articles 337 and 338 are removed from hanger 325 and placed in open rectangular space 313.
″f: passes through the flap 314 and falls into the water.

If desired, a lifting device may be provided within the standard container 318. With this lifting device, the sensing device is gradually lowered into or lifted out of the water through the rectangular opening 313.

<Effects of the Invention> According to the present invention, since the deck stretched between the floats of the multihull is provided with an opening that can be sealed, when the multihull operates in air cushion craft mode, The sealing condition of the air cushion chamber below the deck is not impaired. In addition, an opening is provided above the air cushion chamber, which is protected from the outside by a float and a skirt, so that objects (such as measurement buoys) cannot be dropped into the relatively calm surface of the water at any time through this opening. It is also possible to pull objects out of the water.

It is also possible to drop items and retrieve them without being visible from the outside.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of a multihull boat comprising two floats or shells according to the present invention. FIG. 2 is an enlarged view of part (2) in FIG. 1. 311...Float, 312...Deck, 313.
...Opening portion, 314...Flap, 315...Airtight chamber, 316...Lower end, 317...Inner peripheral edge, 318
... Container, 619 ... Bottom, 320 ... Sealing hose, 321 ... Support part, 322 ... Peripheral groove,
323...Sealing surface, 324...Pivot, 325...
Hanging equipment, 337...Measurement buoy, 338...Measurement probe.

Claims (16)

[Claims] (1) It has at least two floats extending in the direction of travel of the ship, arranged in parallel and spaced apart from each other, and connected by a connecting structure, the connecting structure having an interior structure and a bottom section. In a multihull ship having a deck extending in the transverse direction of the ship above the waterline, at least one closable opening is provided in the deck and closed in a watertight manner by a plate structure. A multihull ship featuring (2) The multihull boat according to claim 1, wherein the plate structure is movable and the opening is closed by the plate structure in a watertight and gastight state. (3) An airtight chamber with an open bottom is provided above the opening;
3. The multi-hull boat according to claim 2, wherein the lower end of the airtight chamber is hermetically connected to the inner peripheral edge portion of the deck surrounding the opening over the entire circumference of the opening. (4) The multihull boat according to any one of claims 1 to 3, wherein the opening is rectangular. (5) The multihull boat according to claim 4, wherein the opening has a cross-sectional shape of approximately 5 to 7 m x 2 to 3 m. (6) Claims 4 or 5, characterized in that the dimensions of the opening match the dimensions of the horizontal cross section of the container having an airtight chamber located directly above the opening and having an open bottom.
Section multihull. (7) A multihull according to claim 6, characterized in that the lower end of the container is connected by removable sealing means to a support forming part of the connecting structure. (8) the sealing means comprises an expandable sealing hose, the sealing hose surrounding the entire lower end of the container and disposed within a groove provided on the periphery of the support surrounding the opening; 8. The multihull boat according to claim 7, wherein the multihull boat contacts the entire periphery of a sealing flange provided on the outer periphery of the lower end of the container in an expanded state. (9) A multihull according to claim 7 or 8, characterized in that the front and rear parts of the container are held on the joint structure by support blocks having a cushioning effect. (10) Claim 1, characterized in that the plate structure consists of two flaps, and these flaps are rotatable about a pivot extending in the longitudinal direction of the ship. A multihull according to any one of paragraphs 9 to 9. (11) The multihull boat according to any one of claims 1 to 10, characterized in that the airtight chamber is provided with a hanging device for suspending an article that can fall through the opening. (12) The multihull boat according to any one of claims 1 to 11, wherein the opening is provided in the third part closest to the stern. (13) The multihull boat according to any one of claims 1 to 12, characterized in that the opening is provided in the center of the catamaran boat. (14) The multihull boat according to any one of claims 10 to 13, wherein the flap is located sufficiently above the water surface in the outwardly rotated state. (15) Claims 10 to 1, characterized in that pivots are provided on the port and starboard sides of the opening.
A multihull according to any one of paragraph 4. (16) The flaps according to any one of claims 10 to 15 are characterized in that both flaps have the same size and are in close contact with each other at the center of the opening in the closed state. Multihull.